Valve for supplied or exhausted room air



J1me 1968 B. LARKFELDT ETAL 3,389,649

VALVE FOR SUPPLIED OR EXHAUSTED ROOM AIR Filed Nov 25, 1966 FIGI.

FIGB.

mvzmons: BIRGER LARKFELDT ANDERS SVENSSON United States Patent 3,389,649 VALVE FOR SUPPLIED 0R EXHAUSTED ROOM AIR Birger Lirkfeldt, Odensjo, Barnarp, and Anders Svensson, Jonkoping, Sweden, assignors to Aktiebolaget Svenska Flaktfabriken, Stockholm, Sweden Filed Nov. 25, 1966, Ser. No. 596,917 Claims priority, application Sweden, Nov. 29, 1965, 15,370/ 65 4 Claims. (Cl. 9841) ABSTRACT OF THE DISCLOSURE A device for regulating the volume and direction of air flow supplied or exhausted through an opening including a substantially closed sector-shaped valve element having overlapping arcuate edge portions mounted in the opening to regulate the direction of flow. A strap mounted on the frame overlaps and maintains the edge portion in the set position.

The present invention relates to a regulating device for supplied or exhausted room air, which consists of a connection piece having a rectangular frame having an opening arranged in a wall or ceiling, a duct section connected to the inside of the frame, and a valve body mounted in the piece.

In ventilating and air conditioning plants, it is often desirable to be able to control the fiow of incoming or outgoing air, and to be able to change the direction of the stream of air being blown into the room. Hitherto, regulators of this kind have been constructed, for example, as a grille with adjustable damper blades, with the aid of which the direction of the air being blown into the room can be altered. In order to also permit control of the volume of air flow through the grille, a hinged flap is arranged in front of the grille, as seen in the direction of air flow. This flap is adjustable in different positions by means of a comparatively complicated and expensive control device.

The object of the present invention is to permit a simple setting of the volume and/or direction of air flow by means of a single element consisting of a valve body arranged in the duct section.

An additional object is to design the valve body so that the least possible noise occurs upon passage of air through the duct section.

This is achieved substantially in that the valve body according to the invention is a closed body of sectorshaped cross section which may be adjusted angularly within the frame opening and in which the included angle is adjustable.

By dividing a supply grille into several sections and inserting a valve body in each section, a grille will be obtained that has an action well suited to its purpose and is simple and cheap to produce.

Two embodiments of the invention will now be described more in detail with reference to the accompanying figures, wherein:

FIG. 1 shows a cross section through a regulating device according to the invention;

FIG. 2 shows the same device seen from the front; and

FIG. 3 shows a similar device embodying the plural valves seen from the front.

The regulator shown in FIGS. 1 and 2 consists of a connection piece with a rectangular frame 1 surrounding an opening and a duct section 2 connected to the inside of the frame. Inside the duct section two damper blades 3 and 4 are pivotally joined along their one edge about a 3,389,649 Patented June 25, 1968 common shaft 5 and act as a throttling device. The opposite edges of the blades are formed with slightly curved portions directed toward and overlapping one another to provide a substantially closed valve body of a principally sector-shaped section. By setting the included angle 6 of the body, the air flow volume is controlled, and by turning the valve body with retained included angle, the direction of air flow can be varied as required. The radius of curvature of each overlapping edge portion is centered on the shaft. As shown in the figures, the adjustments of the valve body are held by a fastener passing through the portions and anchored in a slotted strap mounted across the frame opening and having a curvature similarly centered on the shaft 5.

As regards large units, the regulator may be modified as shown in FIG. 3. In this embodiment, the duct section is divided into a number of sections by means of partitions 7. In each section, there is a valve body 8 pivotally arranged and constructed of blades similar to the blades 3 and 4. In this manner, a grille is provided that is of the necessary size and in which the valve bodies which are in line with each other are arranged on the same shaft. According to a second feature of such a grille, each section has a length equal to twice its width. In this way certain sections can be arranged at right angles to the sections arranged in line with each other and in double rows. For example, as shown, the end sections are arranged at right angles to the rows for the purpose of attaining a suitable diffusion from the grille.

The connection piece can be fixed in position in the wall or ceiling in a simple manner, for example, by spring locking elements arranged at the ends of the connection piece and having recesses in which flanges fastened in the wall are designed to be engaged. Alternatively, attachment of the frame can take place in conformity to the means shown in Swedish Patent 153,807.

We claim:

1. A regulating device for supplied or exhausted ventilating air comprising a rectangular, flanged frame member adapted to be mounted in a ventilation duct opening in a wall or ceiling of a room, a duct section connected to the rear side of said frame member having a common shaft extending perpendicularly with respect to the flow direction in said duct section, and throttling means arranged in said duct section consisting of two angularlyrelated damper blades pivotally joined along their one edge about said shaft, the improvement wherein the damper blades at their opposite edges, are provided with bent, slightly curved edge portions directed towards and overlap-ping into one another so as to form a valve body having a substantially closed, sector-shaped cross section.

2. A regulating device according to claim 1, in which the damper blades loosely receive the shaft, affording turning of the blades independently relative to each other and relative to the shaft, said shaft being stationary and fixed to the walls of the duct secion, and including means to hold the damper blades in set positions.

3. A regulating device according to claim 2 wherein said curved edge portions have a radius of curvature centered on said common shaft, said holding means comprising a strap having a similar curvature mounted on said frame overlying said edge portions, and fasteners to anchor said edge portions to said strap.

4. A regulating device according to claim 1 in which the duct section is divided by partitions into a number of passages, each containing a valve body formed as defined in claim 1, and in which the valve bodies are situated in line with each other land are'pivotally arrhng d oil the FOREIGN iATENTS same shaft. a h '-"-689,133 5/1930, Framer References Cited 1,312,547 8/1962 France. UNITED STATES PATENTS 3,274,916 9/1966 Waeldner 98 102 XR 5 ROBERT A. OLEARY, Primary Examiner.

3,308,744 3/ 1967 Schach 98-106 XR M. A. ANTONAKAS, Assistant Examiner. 

